水泵水轮机主轴密封及烧损故障处理.pdfVIP

第 27 卷第 6 期 水 利 水 电 科 技 进 展 2007 年 12 月 Vol . 27 No . 6 Advances in Science and Technology of Water Resources Dec . 200　7 水泵水轮机主轴密封及烧损故障处理 程云山 (河海大学水利水电工程学院 ,江苏 南京 　210098) 摘要 :大容量 、高转速水泵水轮机主轴密封相对常规水轮机主轴密封更容易发生故障 。分析3 种典 型水泵水轮机主轴密封即平衡式流体静压径向双端面机械密封 、非平衡水压 自调整轴向式分瓣机 械型平面密封 、弹簧复位式浮动型双端面机械密封的结构 、工作原理和故障发生原因 ,提出了这 3 种水泵水轮机主轴密封的故障处理方法 。 关键词 :水泵水轮机 ;主轴密封 ;故障处理 + ( ) 中图分类号 :TK7303 25 　　　文献标识码 :B 　　　文章编号 2007 060044 05 Main shaft seal and burnout accident treatment of pump turbines/ / CHEN G Yunshan ( College of Water Conservancy and Hy drop ower Engineering , Hohai University , N anj ing 210098 , China) Abstract : The main shaft seal of pump turbines with large capacity at high rotational speed is more liable to failure as compared with that of conventional pump turbines. The structure , operational principle , and cause of failures of three types of main shaft seal were analyzed , including the dualend face mechanical seal in radial direction by balanced static pressure of fluid , the mechanical plane seal in petals in axial direction by selfregulated nonbalanced water pressure , and fluctuated dualend face mechanical seal by spring reposition . Finally , the methods for failure treatment of the three kinds of main shaft seal were put forward. Key words : pump turbine ; main shaft seal ; failure treatment 　　水轮机的主轴密封是转动部件与固定部件之间 上的自平衡式轴向平面密封( ) 结构 1 和采用密封环 的封水装置 ,其作用是在机组发电、抽水和停机工况 ( ) 在下